2747 results about "Fuel supply" patented technology

The invention relates to the technical field of ship fuel supply system control, and discloses a double-lug C-type LNG fuel cabin and methanol fuel self-adaptive switching control system which comprises a fuel state sensing module, a switching logic decision module, an execution mechanism control module, a safety redundancy guarantee module and a state feedback recording module. The fuel state sensing module is used for collecting and normalizing fuel parameters and mechanism operation state data; the switching logic decision module constructs a model to simulate switching dynamic characteristics and mechanism response characteristics, and performs parameter adaptation; the execution mechanism control module constructs an algorithm to calculate a switching pressure threshold value, a flow matching value and a valve group action time sequence; the safety redundancy guarantee module evaluates the switching safety; and the state feedback recording module performs secondary evaluation in combination with the environment working condition when the risk exists. According to the system, self-adaptive switching of LNG and methanol fuel is achieved, and switching accuracy, system stability and safety are improved.

The invention discloses a ship response system based on AI large model data fusion, and belongs to the technical field of ships, and the system comprises a dual-mode positioning module which is used for carrying out the centimeter-level positioning of a ship in a target sea area according to a GNSS system and an INS system, and obtaining the centimeter-level positioning ship position data; the data synchronization module is used for acquiring and synchronizing ship multi-source data according to the centimeter-level positioned ship position data to obtain ship situation data; and the edge-cloud collaboration module is used for monitoring the ship in real time according to the ship situation data and an edge-shore-based collaboration mechanism and dynamically adjusting the navigational speed and the fuel supply plan to stop the ship according to the sea condition. The problems that in the prior art, comprehensive and accurate comprehensive information is difficult to form, hidden dangers cannot be found in time, and accidents cannot be prevented in advance are solved.

The invention relates to the technical field of boiler control, and discloses a gas-fired boiler starting control method and system. The method comprises the following steps: acquiring initial operation parameters such as hearth pressure, water inlet temperature, flue gas oxygen content and fuel valve opening of the gas-fired boiler, establishing a thermodynamic state model in a starting stage according to the initial operation parameters, and dividing dynamic response thresholds of different load intervals; and calculating a theoretical fuel supply rate of the combustor based on the model, generating and dynamically updating a fuel supply correction coefficient in combination with a threshold value, synchronously marking key nodes according to abnormal distribution of hearth temperature, and adjusting a spatial air distribution strategy of the combustor. And after the correction coefficient is subjected to multi-stage buffer smoothing, a fuel control instruction is output to an executing mechanism. And switching to steady state control after the boiler reaches the preset load. The method adapts to the characteristics of a power plant unit, so that the starting process is more stable, the damage to a heated surface and pollutant emission are reduced, and rapid grid connection is assisted.

A pre-ignition prevention system for a turbulent jet ignition (TJI) engine having dual spark plugs includes an ion sensing system and a controller configured to receive the ion sense signal from the ion sensing system, detect, using the ion sense signal, a misfire event where a firing of a first spark plug fails to completely combust a fuel / air pre-charge in a pre-chamber of a cylinder of the TJI engine, in response to detecting the misfire event, detect, using the ion sense signal, an exhaust stroke heat release event after a firing of the second spark plug indicative of a remaining portion of a primary fuel / air charge in the main chamber and, in response to detecting the exhaust stroke heat release event, adjust fueling for at least one subsequent combustion cycle to prevent pre-ignition of the remaining portion of the primary fuel / air charge in the main chamber.

The invention discloses a high-pressure main engine LNG fuel supply system, and relates to the technical field of LNG fuel high-pressure main engines, the high-pressure main engine LNG fuel supply system comprises a pressurization unit, an evaporation unit and a conveying unit, a fuel inlet of a high-pressure evaporator of the evaporation unit is connected with a high-pressure liquid supply pipe, and a fuel gas outlet of the high-pressure evaporator is connected with a high-pressure gas outlet pipe; a heating medium inlet of the high-pressure evaporator is connected with a steam pipeline, a heating medium outlet of the high-pressure evaporator is connected with a condensate water pipeline, and the condensate water pipeline is emptied. The steam pipeline is connected with the heating medium inlet of the high-pressure evaporator, and the heating medium outlet of the high-pressure evaporator is connected with the condensate water pipeline, so that steam is directly introduced into the high-pressure evaporator, a steam direct heating mode is adopted, a middle heating medium circulating pipeline is omitted, and the system efficiency is improved; and the condensate water is discharged in an open mode, the safety of the system can be guaranteed essentially, leaked gas cannot be brought back to a safety area, and therefore the reliability of the ship is improved.

The application provides an aero-engine acceleration limiting method, and relates to the technical field of aero-engines, and comprises the following steps: receiving a flight control instruction, calculating a first fuel supply amount according to the flight control instruction, and executing single / dual-outer-envelop working mode conversion; detecting a position state of an actual mode selection valve and a rotating speed feedback value in real time; judging whether the current state of the engine meets the mode switching condition of single / dual-outer-envelop according to the position state of the mode selection valve; calculating a second fuel supply amount, a third fuel supply amount, and a fourth fuel supply amount according to the position state of the mode selection valve, combining the first fuel supply amount, a fifth fuel supply amount, taking the minimum value among the five fuel supply amounts, comparing the minimum value with a sixth fuel supply amount to take the maximum value, taking the minimum value with a seventh fuel supply amount, taking the maximum value of the comparison result with an eighth fuel supply amount as a control fuel supply amount output; and judging whether the engine is in an acceleration / deceleration state according to a rotating speed difference. The application solves the safety problem possibly caused by the acceleration / deceleration process of the dual-outer-envelop engine.

A fuel pressure controller includes processing circuitry that executes a first process, a second process, and a third process as a fuel pressure reduction control. The first process includes closing both a first electromagnetic valve and a second electromagnetic valve. The second process includes adjusting the pressure of the fuel supplied to a fuel injection valve by repeatedly performing an opening and closing operation of the second electromagnetic valve. The third process includes, when the fuel pressure in a fuel pipe between the first electromagnetic valve and the second electromagnetic valve reaches a prescribed pressure, stopping the opening and closing operation of the second electromagnetic valve to maintain the second electromagnetic valve in an open state, and repeatedly performing the opening and closing operation of the first electromagnetic valve to adjust the pressure of the fuel supplied to the fuel injection valve.

The invention relates to the technical field of energy conservation and environmental protection, in particular to an industrial boiler combustion oscillation modal suppression system and a method thereof, and constructs a system which is highly intelligent, high in adaptability and remarkable in suppression effect by fusing innovative technologies such as multi-dimensional perception, intelligent identification, active suppression and adaptive optimization. The data acquisition module accurately captures hearth temperature, flame video and sound pressure signals; the signal processing module deeply analyzes and extracts oscillation modes of a temperature field and a flame area, and analyzes a sound pressure signal frequency spectrum through short-time Fourier transform; the mode identification module accurately identifies the combustion oscillation mode and determines the characteristic frequency and amplitude of the combustion oscillation mode; the suppression control module generates an infrasonic wave intervention signal to form an anti-phase sound field so as to effectively suppress oscillation; the fuel adjusting module adjusts the opening time sequence of the gas nozzle according to the instruction, and fuel supply is optimized. According to the system, the operation stability and heat efficiency of the boiler are remarkably improved, NOx emission is greatly reduced, and powerful technical support is provided for clean and efficient operation of the industrial boiler.

The invention provides a control method and system for fuel supply of a volatilization kiln, and belongs to the technical field of industrial control. Firstly, real-time working condition data and historical working condition data of the volatilization kiln are obtained, working condition trend prediction processing is carried out based on the real-time working condition data and the historical working condition data of the volatilization kiln, and a working condition trend prediction result is obtained; the method comprises the following steps: constructing a fuel supply plan library according to a working condition trend prediction result, monitoring the deviation between the current working condition and the prediction result in real time, matching and dynamically adapting a target supply adjustment strategy from the fuel supply plan library to obtain an execution scheme, sending the execution scheme to a fuel supply system for execution, and collecting feedback data to update the plan library. Therefore, fuel supply of the volatilization kiln can be intelligently and accurately controlled, production efficiency and product quality are improved, and cost is reduced.

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a water-hydrogen combined supply internal combustion engine which comprises a first power generation unit driven by hydrogen and air combusted by a hydrogen internal combustion engine unit. The gas recovery unit converts water vapor in exhausted gas into liquid water through a condensation driving module and drives the second power generation unit at the same time; the fuel supply unit adjusts the hydrogen injection amount through a generated adjusting instruction based on multi-dimensional data detected by the monitoring unit and processed by the data processing unit and the confidence decision-making unit, and then generation of nitric oxide is inhibited. Condensate water recovery and combustion control of the hydrogen internal combustion engine are deeply combined, the actual exhaust humidity is reversely deduced by monitoring the flow of the condensate water, the gas detection error tolerance range is dynamically corrected, the hydrogen-oxygen combustion ratio judgment result is linked, safety amplitude limiting control over hydrogen fuel supply is achieved, and nitrogen oxide generation of the hydrogen internal combustion engine is reduced.

The present application provides a dynamics analysis method for an ammonia combustion refrigeration system in large park cooling. The method comprises: on the basis of a geometric structure of an ammonia combustion chamber and a fuel supply amount, calculating the heat generated by ammonia combustion and analyzing the heat transfer mode between the combustion chamber and a desorption tower, the heat transfer mode comprising direct contact type heat transfer and partition type heat transfer, and simulating the heat transfer process to obtain and draw the heat flux distribution of the tower wall surface; on the basis of the flow state and a relationship curve between the pressure drop and the flow velocity, analyzing the desorption process of a refrigerant in a solution, and on the basis of the concentration of the solution, a boiling point of the refrigerant, and the vapor pressure, calculating local desorption rates at different positions in the desorption tower and the refrigerant vapor generation amount; and on the basis of the heat flux distribution, calculating the temperature distribution of the solution, and analyzing the heat transfer and mass transfer processes in the desorption tower to obtain a local heat transfer coefficient and the mass transfer efficiency distribution of the surface of a filler.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

The present application discloses an aircraft configured for vertical take-off and landing and horizontal flight. The aircraft includes (i) a first nacelle fuel tank configured to hold a first fuel supply for a first engine and to selectively provide fuel to the first engine during both (a) a vertical take-off and landing, and (b) horizontal flight; (ii) a fuselage fuel tank, and (iii) a control system configured to redistribute fuel between the first nacelle fuel tank and the fuselage fuel tank.

An aircraft fuel system includes a fuel tank, a fuel pump configured to receive a fuel flow from the fuel tank via a fuel supply line. The fuel system further includes a tap fluidly coupled to an outlet of the fuel pump, at least one generator or permanent magnet machine fluidly connected to the fuel pump via the tap, and the tap is configured to deliver fuel to the at least one generator or permanent magnet machine. The fuel system further includes a gearbox mechanically connected to the at least one generator or permanent magnet machine.

The invention discloses an electricity and heat coordination method and system of a solid oxide fuel cell heat and power cogeneration system. The method comprises the following steps: acquiring a system operation parameter set (an electric load, a heat load, an electric pile temperature, a tail gas temperature and a fuel flow) in real time; determining a thermoelectric coordination control target value including a target power generation efficiency interval and a target heat supply temperature interval based on the parameter set; a fuel supply and air flow adjusting instruction is generated; executing the instruction to dynamically match the output power of the system with the electric load demand, dynamically match the output temperature of the waste heat recovery system with the thermal load demand, and generate a real-time heat-to-power ratio; when the stack temperature exceeds a preset safety threshold value, the fuel flow is preferentially reduced to a temperature return safety interval, and the air flow is synchronously compensated according to a stoichiometric ratio; and dynamically correcting the boundary value of the target power generation efficiency interval based on the real-time heat-to-electricity ratio, so that the real-time heat-to-electricity ratio of the system is always in the preset optimal efficiency interval. According to the invention, dynamic decoupling control and continuous efficiency optimization of the electric heating load are realized.

A fuel reforming system for a vehicle includes a reciprocating engine mounted on a vehicle, a decomposer that decomposes a hydrocarbon fuel into carbon and a hydrogen gas and that stores the carbon, a hydrocarbon fuel supply unit that supplies the hydrocarbon fuel to the decomposer, and a hydrogen gas supply unit that supplies the hydrogen gas into a cylinder. The reciprocating engine performs a cycle including a compression stroke, an expansion stroke, and a re-compression stroke. The decomposer decomposes the hydrocarbon fuel into the carbon and the hydrogen gas utilizing the heat and the pressure of a combustion gas in the re-compression stroke. The decomposer includes a catalyst to which the carbon adheres and a water vapor adsorption portion in which water vapor is adsorbed.

A gas turbine engine, comprising a compressor section, combustion section, and turbine section in serial flow arrangement, with the combustion section comprising: a combustor liner at least partially defining a combustion chamber; a wall coupled to the combustor liner; a first fuel supply to supply a first fuel; a gaseous fuel supply to supply a gaseous hydrogen fuel; and a fuel nozzle assembly coupled to the wall and fluidly coupled to the first fuel supply and the gaseous hydrogen fuel supply, the fuel nozzle assembly comprising: a main mixer; and a fuel nozzle comprising an outer wall defining a pilot channel and an outer wall fuel orifice to emit at least one of the first fuel or the gaseous fuel radially outward into the main mixer; and a secondary mixer disposed in the pilot channel.

The invention provides a ship LNG fuel supply and tail gas carbon dioxide capture system. The ship LNG fuel supply and tail gas carbon dioxide capture system comprises an LNG storage tank, a CO2 separation device, a CO2 compressor, an ejector, an LNG vaporization heater, a mixed gas heat exchanger, a flash tank, a liquid CO2 storage tank, a flue gas heat exchanger and an engine. According to the system, LNG cold energy and engine tail gas heat energy can be effectively utilized, and the energy consumption of the system is reduced.

The invention relates to the technical field of generator set energy-saving control, and discloses an energy-saving control system and method of an energy-saving generator set. The system comprises a vibration monitoring module, a load demand prediction module, an energy efficiency optimization decision module, an abnormal state recognition module and a dynamic regulation and control execution module. The vibration monitoring module collects mechanical vibration intensity in real time; the load demand prediction module generates a load demand prediction curve by using a dynamic load distribution algorithm; the energy efficiency optimization decision module determines an operation mode switching strategy through a multi-objective optimization algorithm; the abnormal state recognition module analyzes vibration frequency domain characteristics to evaluate equipment health; and the dynamic regulation and control execution module adjusts fuel supply and power output through a closed-loop control algorithm according to the strategy and the evaluation index. The method can accurately predict the load, optimize the operation mode, monitor the equipment health, effectively improve the energy utilization efficiency of the generator set, guarantee the stable operation of the equipment, reduce the cost, and adapt to various working conditions and new energy development requirements.

The invention relates to a chemical looping combustion variable load system based on flue gas recirculation and a control method. The system comprises a chemical looping combustion system and a flue gas recirculation system (7), the chemical looping combustion system comprises an air reactor (1), a fuel reactor (2), an AR cyclone separator (3), an FR cyclone separator (4), an AR material return device (5), an FR material return device (6), an air supply system (8) and a fuel supply system (9). By controlling the flow and temperature of recirculated flue gas of the flue gas recirculating system and cooperatively controlling the opening degree of the conical valve and the circulating flux of the system, the load of the chemical looping combustion system is flexibly adjusted, the energy consumption is reduced, the efficiency is improved, and the operation cost is reduced; and the rest high-temperature flue gas enters a flue gas treatment system to be treated, high-purity CO2 gas is obtained after heat exchange, condensation and purification, and finally efficient combustion of fuel and low-energy-consumption carbon capture are achieved.

A combustor for a gas turbine system includes a combustor body, a head end fuel nozzle assembly, and an axial fuel stage (AFS) injector. An air flow passage defined at least partially by the combustor body is configured to deliver a first portion of an air supply to the head end fuel nozzle assembly, and the AFS injector is configured to receive a second portion of the air supply. A valve is operatively positioned between the air supply and the AFS injector. With the AFS injector on (i.e., fueled), the valve is open, and a third, additional portion of the air supply flows to the AFS injector. With the AFS injector off (i.e., unfueled), the valve is closed to block the third portion flowing to the AFS injector and to deliver it to the head end fuel nozzle assembly, which reduces the firing temperature for highly reactive fuels.

To monitor the fuel supply status from a fuel tank to a fuel cell in a work vehicle.SOLUTION: A work vehicle is equipped with a fuel cell, a fuel tank that stores fuel to be supplied to the fuel cell, a detection device that detects the state of fuel released from the fuel tank, and a control device, and the control device calculates the amount of fuel released based on the state of the fuel detected by the detection device and the amount of fuel consumed in the fuel cell.SELECTED DRAWING: Figure 4

Embodiments of systems and methods for supplying fuel, enabling communications, and conveying electric power associated with operation of a hydraulic fracturing unit of a plurality of hydraulic fracturing units are disclosed and may include a fuel line connection assembly configured to be connected to the first hydraulic fracturing unit and to supply fuel from a fuel source to a gas turbine engine connected to the hydraulic fracturing unit. A system also may include a communications cable assembly configured to be connected to the hydraulic fracturing unit and to enable data communications between the hydraulic fracturing unit and a data center or another hydraulic fracturing unit. A system further may include a power cable assembly configured to be connected to the hydraulic fracturing unit and to convey electric power between the hydraulic fracturing unit and a remote electrical power source or the plurality of hydraulic fracturing units.

The invention discloses a storage and supply system for enhancing flexible operation of a coal power unit by a pulverized coal bunker, particularly relates to the field of thermal power generation, and is used for solving the problem that fuel conveying and combustion are asynchronous during rapid load adjustment of the coal power unit. Coordination control is carried out with the unified fuel demand as the center, the lag effect of pulverized coal storage and release is accurately predicted and counteracted before pulverized coal enters a boiler, and the pulverized coal conveying rhythm is closely aligned with the actual coal use demand. In this way, the oxygen amount and temperature fluctuation in the boiler combustion process are greatly reduced, and the problems that due to the fact that fuel supply is fast and slow, combustion in the boiler is not stable, and pollutant emission is increased are solved; meanwhile, the whole control method can automatically learn and adjust, frequent human intervention is not needed, operation is simpler, more convenient and safer, the capacity of a power plant for rapidly adapting to power grid load changes is remarkably improved, and the flexible advantage of pulverized coal storage and supply is fully played.

On board an aircraft, a method is perform in which the following steps are implemented in the following order: measuring a first density value, a first dielectric constant value and a first temperature value of the fuel at a first time, measuring a second density value, a second dielectric constant value and a second temperature value of the fuel, determining parameters of a function for calculating a density from a temperature or a dielectric constant, measuring a volume flow rate value and at least one of a third temperature value and a third dielectric constant value of the fuel in a fuel injection duct in the engine, and determining a density value of the fuel and a mass flow rate of the fuel in the injection line.

The invention relates to the technical field of engineering machinery control, in particular to a fuel efficiency optimization method and system based on multi-modal visual fusion, and the method comprises the steps: obtaining an environment image around engineering machinery, generating a disparity map, and carrying out the three-dimensional reconstruction; according to the reconstructed image and a pre-stored engineering machinery joint model, obtaining three-dimensional coordinates and spatial postures of the movable arm joint; classifying the current working conditions of the engineering machinery according to the three-dimensional coordinates and the spatial attitude of the movable arm joint, the state parameters of the engineering machinery and the reconstructed image, and determining the action states and slope repairing angles under different working condition types; and according to the working condition type, the action state and the slope repairing angle, based on a pre-constructed fuel mapping database, obtaining a corresponding load intensity coefficient, an engine rotating speed, a main pump pressure, a fuel supply correction coefficient and torque compensation, and adjusting the current state parameters of the engineering machinery to realize fuel optimization.

The invention relates to the technical field of aerospace power, in particular to a single-gas-path driving and fluidizing integrated compact type powder fuel supply device and a single-gas-path driving and fluidizing integrated compact type powder fuel supply method. The single-gas-path driving and fluidizing integrated compact powder fuel supply device comprises a powder storage cavity straight pipe section, a powder storage cavity contraction section, a gas cavity and a fluidizing gas supply device, the powder storage cavity contraction section and the gas cavity are arranged at the two ends of the powder storage cavity straight pipe section, and a rigid piston is slidably connected into the powder storage cavity straight pipe section; the rigid piston, the powder storage cavity straight pipe section and the gas cavity form a driving cavity, and the rigid piston, the powder storage cavity straight pipe section and the powder storage cavity contraction section form a fuel cavity; the fluidizing gas supply device comprises a gas supply structure arranged in the length direction of the straight pipe section of the powder storage cavity and a branch gas inlet structure arranged at one end of the gas supply structure, and the other end of the gas supply structure communicates with the driving cavity, so that gas in the driving cavity enters the fuel cavity through the fluidizing gas supply device and drives powder fuel to flow out from the two-phase outlet.

According to the marine LNG fuel supply system, a plurality of damping assemblies are arranged between a base and a fuel tank at intervals in the preset direction, and the damping assemblies are used for supporting the fuel tank and can reduce the displacement amount of the fuel tank relative to the base; the influence on the stability of the fuel tank due to shaking and vibration generated by water flow during ship navigation is avoided, and liquid shaking in the fuel tank is reduced, so that the shaking and vibration amplitude of the ship is reduced, and the stability and safety of ship navigation are improved; and meanwhile, when the fuel tank inclines due to shaking of the ship body, the damping assembly can move towards the descending side of the fuel tank, so that the supporting and damping effects are improved when the fuel tank inclines, and the stability of the fuel tank is further guaranteed.

The invention relates to the technical field of high-alkali coal unit coordination control, and discloses a high-alkali coal unit coordination control system performance comprehensive evaluation method and system, and the method comprises the steps: collecting operation parameter data through a plurality of sensors disposed at key positions of a unit to generate a performance data set, and receiving real-time data through an evaluation server to construct a performance matrix; the performance matrix is processed, features are extracted in combination with a performance data set, performance is predicted according to the operation state gradient and control parameter information, performance index space-time distribution features are output through a comprehensive evaluation model, and the performance data set is updated; and dynamically adjusting unit coordination control according to the evaluation indexes, wherein the operations comprise valve opening, fuel supply and the like. The system comprises a plurality of sensors, an evaluation server, a performance evaluation index determination module and a dynamic adjustment module. According to the invention, comprehensive and dynamic evaluation and accurate control of the performance of the coordinated control system of the high-alkali coal unit are realized, and the safety, stability and economical efficiency of unit operation are improved.

A fuel supply device for an internal combustion engine includes a tank, a fuel injection valve, a fuel passage, a second shut-off valve to open and close the fuel passage, a variable volume mechanism configured to vary the volume of a downstream-side fuel passage, which is a section of the fuel passage that is connected to a downstream side of the electromagnetic valve, and a controller that executes a fuel pressure control. In the fuel pressure control, the second shut-off valve is repeatedly opened and closed such that the fuel pressure in the downstream-side fuel passage falls within a range defined by an upper limit value and a lower limit value. The controller executes a volume increasing process that operates the variable volume mechanism to increase the volume of the downstream-side fuel passage during the execution of the fuel pressure control.